Controlling properties and cytotoxicity of chitosan nanocapsules by chemical grafting

De Matteis, L. ; Alleva, M. ; Serrano-Sevilla, I. ; García-Embid, S. ; Stepien, G. ; Moros, M. ; de la Fuente, J.M. (Universidad de Zaragoza)

Resumen: The tunability of the properties of chitosan-based carriers opens new ways for the application of drugs with low water-stability or high adverse effects. In this work, the combination of a nanoemulsion with a chitosan hydrogel coating and the following poly (ethylene glycol) (PEG) grafting is proven to be a promising strategy to obtain a flexible and versatile nanocarrier with an improved stability. Thanks to chitosan amino groups, a new easy and reproducible method to obtain nanocapsule grafting with PEG has been developed in this work, allowing a very good control and tunability of the properties of nanocapsule surface. Two different PEG densities of coverage are studied and the nanocapsule systems obtained are characterized at all steps of the optimization in terms of diameter, Z potential and surface charge (amino group analysis). Results obtained are compatible with a conformation of PEG molecules laying adsorbed on nanoparticle surface after covalent linking through their amino terminal moiety. An improvement in nanocapsule stability in physiological medium is observed with the highest PEG coverage density obtained. Cytotoxicity tests also demonstrate that grafting with PEG is an effective strategy to modulate the cytotoxicity of developed nanocapsules. Such results indicate the suitability of chitosan as protective coating for future studies oriented toward drug delivery.

Idioma: Inglés

DOI: 10.3390/md14100175

Año: 2016

Publicado en: Marine Drugs 14, 10 (2016), [15 pp.]
ISSN: 1660-3397

Factor impacto JCR: 3.503 (2016)

Categ. JCR: CHEMISTRY, MEDICINAL rank: 13 / 60 = 0.217 (2016) - Q1 - T1

Factor impacto SCIMAGO: 0.883 - Drug Discovery (Q2)

Financiación: info:eu-repo/grantAgreement/EC/H2020/660228/EU/Profiling gene expression in Hydra vulgaris following Gold Nanoparticle-mediated hyperthermia/HyHeat
Financiación: info:eu-repo/grantAgreement/ES/MINECO/SAF2014-54763-C2-2-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)